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wish8.4 - Online in the Cloud

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This is the command wish8.4 that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


wish - Simple windowing shell

SYNOPSIS


wish ?fileName arg arg ...?

OPTIONS


-colormap new Specifies that the window should have a new private colormap instead
of using the default colormap for the screen.

-display display Display (and screen) on which to display window.

-geometry geometry Initial geometry to use for window. If this option is specified, its
value is stored in the geometry global variable of the application's
Tcl interpreter.

-name name Use name as the title to be displayed in the window, and as the name
of the interpreter for send commands.

-sync Execute all X server commands synchronously, so that errors are
reported immediately. This will result in much slower execution, but
it is useful for debugging.

-use id
Specifies that the main window for the application is to be embedded │
in the window whose identifier is id, instead of being created as an │
independent toplevel window. Id must be specified in the same way as │
the value for the -use option for toplevel widgets (i.e. it has a │
form like that returned by the winfo id command).

-visual visual Specifies the visual to use for the window. Visual may have any of
the forms supported by the Tk_GetVisual procedure.

-- Pass all remaining arguments through to the script's argv variable
without interpreting them. This provides a mechanism for passing
arguments such as -name to a script instead of having wish interpret
them.
_________________________________________________________________

DESCRIPTION


Wish is a simple program consisting of the Tcl command language, the Tk toolkit, and a
main program that reads commands from standard input or from a file. It creates a main
window and then processes Tcl commands. If wish is invoked with no arguments, or with a
first argument that starts with ``-'', then it reads Tcl commands interactively from
standard input. It will continue processing commands until all windows have been deleted
or until end-of-file is reached on standard input. If there exists a file .wishrc in the
home directory of the user, wish evaluates the file as a Tcl script just before reading
the first command from standard input.

If wish is invoked with an initial fileName argument, then fileName is treated as the name
of a script file. Wish will evaluate the script in fileName (which presumably creates a
user interface), then it will respond to events until all windows have been deleted.
Commands will not be read from standard input. There is no automatic evaluation of
.wishrc when the name of a script file is presented on the wish command line, but the
script file can always source it if desired.

OPTIONS


Wish automatically processes all of the command-line options described in the OPTIONS
summary above. Any other command-line arguments besides these are passed through to the
application using the argc and argv variables described later.

APPLICATION NAME AND CLASS


The name of the application, which is used for purposes such as send commands, is taken
from the -name option, if it is specified; otherwise it is taken from fileName, if it is
specified, or from the command name by which wish was invoked. In the last two cases, if
the name contains a ``/'' character, then only the characters after the last slash are
used as the application name.

The class of the application, which is used for purposes such as specifying options with a
RESOURCE_MANAGER property or .Xdefaults file, is the same as its name except that the
first letter is capitalized.

VARIABLES


Wish sets the following Tcl variables:

argc Contains a count of the number of arg arguments (0 if none), not including
the options described above.

argv Contains a Tcl list whose elements are the arg arguments that follow a --
option or don't match any of the options described in OPTIONS above, in
order, or an empty string if there are no such arguments.

argv0 Contains fileName if it was specified. Otherwise, contains the name by
which wish was invoked.

geometry If the -geometry option is specified, wish copies its value into this
variable. If the variable still exists after fileName has been evaluated,
wish uses the value of the variable in a wm geometry command to set the
main window's geometry.

tcl_interactive
Contains 1 if wish is reading commands interactively (fileName was not
specified and standard input is a terminal-like device), 0 otherwise.

SCRIPT FILES


If you create a Tcl script in a file whose first line is
#!/usr/local/bin/wish
then you can invoke the script file directly from your shell if you mark it as executable.
This assumes that wish has been installed in the default location in /usr/local/bin; if
it's installed somewhere else then you'll have to modify the above line to match. Many
UNIX systems do not allow the #! line to exceed about 30 characters in length, so be sure
that the wish executable can be accessed with a short file name.

An even better approach is to start your script files with the following three lines:
#!/bin/sh
# the next line restarts using wish \
exec wish "$0" ${1+"$@"}
This approach has three advantages over the approach in the previous paragraph. First,
the location of the wish binary doesn't have to be hard-wired into the script: it can be
anywhere in your shell search path. Second, it gets around the 30-character file name
limit in the previous approach. Third, this approach will work even if wish is itself a
shell script (this is done on some systems in order to handle multiple architectures or
operating systems: the wish script selects one of several binaries to run). The three
lines cause both sh and wish to process the script, but the exec is only executed by sh.
sh processes the script first; it treats the second line as a comment and executes the
third line. The exec statement cause the shell to stop processing and instead to start up
wish to reprocess the entire script. When wish starts up, it treats all three lines as
comments, since the backslash at the end of the second line causes the third line to be
treated as part of the comment on the second line.

The end of a script file may be marked either by the physical end of the medium, or by the │
character, '\032' ('\u001a', control-Z). If this character is present in the file, the │
wish application will read text up to but not including the character. An application │
that requires this character in the file may encode it as ``\032'', ``\x1a'', or │
``\u001a''; or may generate it by use of commands such as format or binary.

PROMPTS


When wish is invoked interactively it normally prompts for each command with ``% ''. You
can change the prompt by setting the variables tcl_prompt1 and tcl_prompt2. If variable
tcl_prompt1 exists then it must consist of a Tcl script to output a prompt; instead of
outputting a prompt wish will evaluate the script in tcl_prompt1. The variable
tcl_prompt2 is used in a similar way when a newline is typed but the current command isn't
yet complete; if tcl_prompt2 isn't set then no prompt is output for incomplete commands.

KEYWORDS


shell, toolkit

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